Beginner's luck is the idea that beginners are more likely to win when they try something new, such as a game, sport, or activity. It's considered a superstition because it's a belief that isn't based on fact. Usually grumbled by an expert who just lost a game to a novice, "beginner's luck" is the idea that newbies are unusually likely to win when they try out a sport, game or activity for the first time.